RHS 80x50x2.5 is a cold-formed welded rectangular steel tube identified by its overall depth, width, and wall thickness. This page brings together the verified section data and the associated DWG resource for drafting, coordination, and preliminary reference.
The designation should be read together with its stated units and standard reference. In a United States workflow, take particular care to retain the listed metric units when importing the drawing or transferring the section information into CAD, BIM, estimating, or calculation software.
RHS 80x50x2.5
Cold Formed Welded Rectangular Steel Tubes
refer to : EN 10219-2
the European standard that specifies tolerances, dimensions, and sectional properties for cold-formed welded structural hollow sections made of non-alloy and fine grain steels. It complements EN 10219-1, which covers technical delivery conditions.
Dimension : 80x50x2.5
Depth : 80 mm
Width : 50 mm
Thickness : 2.5 mm
Outer Corner Radius : 5 mm
Inner Corner Radius : 2.5 mm
Sectional Area : 6.09 cm2
Unit Weight : 4.8 kg/m
How to Read the RHS Designation
The section name follows the common rectangular hollow section format: depth by width by thickness. For this profile, the depth is 80 mm, the width is 50 mm, and the thickness is 2.5 mm. Because the two overall sides are different, orientation matters when the section is shown in a drawing or used in an analysis model.
Key Reference Information
- Section type: Cold-formed welded rectangular steel tube
- Overall size: 80x50x2.5
- Outer corner radius: 5 mm
- Inner corner radius: 2.5 mm
- Sectional area: 6.09 cm²
- Unit weight: 4.8 kg/m
- Referenced dimensional standard: EN 10219-2
Why the Corner Radii Matter
An RHS is not represented accurately by four perfectly square external corners. The outer and inner corner radii affect the section outline, clearances, fit-up, and how the profile should be drawn. They are especially relevant when preparing close-fitting plates, openings, end details, or fabrication drawings.
A simplified rectangular outline may be adequate for some diagrammatic views, but detailed CAD work should retain the rounded-corner geometry where coordination depends on the actual profile shape.
Understanding Area and Unit Weight
Sectional area describes the amount of steel in the cross-section. Unit weight expresses the mass associated with a unit length of the member. These values support quantity checks, material schedules, and model verification, but they do not by themselves establish member strength or project suitability.
Design checks may also require section properties, material grade, member length, support conditions, connection behavior, loading, and the applicable design standard. Those items are not established by the section designation alone.
EN 10219-2 Context
The cited reference addresses dimensions, tolerances, and sectional properties for cold-formed welded structural hollow sections. It is related to EN 10219-1, which addresses technical delivery conditions. A project specification should be checked to confirm the required product standard, material designation, documentation, and acceptance criteria.
Using the DWG Resource
Before incorporating the drawing into a production file, confirm the CAD units and compare the imported geometry with the listed depth, width, thickness, and corner radii. Also review layer names, linework, insertion point, and drawing scale in the destination software.
The DWG is best used as a drafting reference rather than as evidence of structural capacity or fabrication compliance. Final member selection, connection detailing, and project-specific verification remain the responsibility of the appropriate design and fabrication professionals.
Related Topics for Further Reference
This profile connects naturally with broader topics such as rectangular hollow section dimensions, HSS and RHS terminology, cold-formed hollow sections, section-property interpretation, steel unit weight, welded connections, base plates, and CAD detailing practices.
Frequently Asked Questions
What does RHS 80x50x2.5 mean?
RHS means rectangular hollow section. The designation identifies an 80 mm depth, 50 mm width, and 2.5 mm wall thickness.
What is the unit weight of this section?
The listed unit weight is 4.8 kg/m. This value is useful for quantity and mass calculations when lengths are handled in compatible units.
What corner radii are listed for this RHS?
The outer corner radius is 5 mm, and the inner corner radius is 2.5 mm. These radii should be considered when accurate section geometry or close-fitting details are required.
Which standard is referenced?
The page references EN 10219-2 for dimensions, tolerances, and sectional properties of cold-formed welded structural hollow sections. Technical delivery conditions are associated with EN 10219-1.
Does the sectional area provide the member capacity?
No. Sectional area is one geometric property and does not establish load capacity by itself. Capacity depends on additional section properties, material information, member conditions, loading, connections, and the governing design requirements.
What should be checked after downloading the DWG?
Confirm the file units, overall geometry, wall thickness, corner radii, layers, insertion point, and scale before using the drawing in a project file.
